epo

Will quickly add that the hotels will NOT have any issue with your guest for the week (Colombian or otherwise) if registered with a valid cédula civil.  What they are concerned about is using the premises for multiple sexual encounters which indicates prostitution which carries penalties for the property. Have posted about this before. So most hotels and buildings want to colour within the lines in Medellín and avoid issues with police -- like an inspection of guest visitor logs which hotels keep by law.
My suggestion (for all travellers to Medellín) is to treat your security guard (vigilante) with great respect -- offer them a coffee, an empanda, hell, buy them lunch if you are getting food -- and most of them will look out for you and not report what you are up to with guests. Most Paisas are fine with gay visitors but don't piss them off and you should be just fine.